Gabrielcalo
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In the book Yeast, in the section on Milk and Quality Assurance of Beer - Coating Methods, to evaluate the yeast slurry quality, the book reads as follows:
"When working with yeast slurry, typical testing involves removing a 10-milliliter sample, diluting it 1:100 with sterile water, and using the spread plate or pour plate method and a suitable medium. (If bacteria counts are more than 1 per milliliter, and wild yeast is more than 1 per 0.1 milliliter, you should not use the yeast slurry.)"
My question is, when it says "if bacteria counts are more than 1 per mililiter", that mean, one single bacteria cell looking at microscope, or it means the quantity of colonies formed in the medium (spread or pour plate)?
"When working with yeast slurry, typical testing involves removing a 10-milliliter sample, diluting it 1:100 with sterile water, and using the spread plate or pour plate method and a suitable medium. (If bacteria counts are more than 1 per milliliter, and wild yeast is more than 1 per 0.1 milliliter, you should not use the yeast slurry.)"
My question is, when it says "if bacteria counts are more than 1 per mililiter", that mean, one single bacteria cell looking at microscope, or it means the quantity of colonies formed in the medium (spread or pour plate)?
